分類 / Names
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Characiformes (Characins) >
Characidae (Characins; tetras) > Tetragonopterinae
Etymology: Tetragonopterus: Name from Greek words: 'Tetra' meaning four; 'gonia' meaning angle; 'pteron' for fin; referring to the evident tetragonal shape of the body (Ref. 124043); denticulatus: The specific name denticulatus, from Latin, refers to the presence of small teeth on the dentary, a condition distinguishing the species from its congeners.
Environment: milieu / climate zone / depth range / distribution range
生態学
; 新鮮な水 底生の漂泳性. Tropical
South America: middle Rio Araguaia in Brazil.
サイズ / 重さ / 年齢
Maturity: Lm ? range ? - ? cm
Max length : 6.8 cm SL オス/雌雄の選別がない; (Ref. 93280)
簡単な記述
検索表 | 形態学 | 形態計測学
背鰭 (合計) : 9; 臀鰭: 32 - 35. This species is distinguished from all its congeners, except T. anostomus, T. juruena, T. kuluene, by the principal teeth on dentary 5-6 (vs. 4) and by having thinner and sharper teeth (vs. larger and more robust); differs from T. anostomus by the terminal mouth (vs. subsuperior mouth); differs from T. anostomus, T. kuluene by the conspicuous humeral marks 2 (vs. 1); differs from T. anostomus, T. araguaiensis by the number of rakers on the lower limb and upper limb of the first gill arch 13-14 and 8-9. respectively (vs. 17-20 and 10-12); differs from T. juruena, T. kuluene by the scale rows between lateral line and dorsal-fin origin 7 (vs. 6); differs from T. argenteus by the predorsal scales 8 (vs. 11-17); differs from T. carvalhoi by the presence of a rounded dark mark on caudal peduncle (vs. a lozenge-shaped mark); differs from T. rarus, T. georgiae by the scale rows between lateral line and pelvic-fin origin 3.5 (vs. 4.5-5.5); differs from T. rarus by the absence of dark longitudinal stripes on the trunk (vs. presence); differs from T. ommatus by the maxillary teeth 3-4 (vs. 7-8) and by having a mark centered on caudal peduncle (vs. mark limited to the posterior portion of caudal peduncle) (Ref. 124043).
Life cycle and mating behavior
成熟 | 繁殖 | 放精 | 卵 | 生産力 | 幼生
Silva, G.S.C., B.F. Melo, C. Oliveira and R.C. Benine, 2016. Revision of the South American genus Tetragonopterus Cuvier, 1816 (Teleostei: Characidae) with description of four new species. Zootaxa 4200(1):1-46. (Ref. 124043)
IUCNのレッドリストの状況は (Ref. 130435: Version 2024-1)
Human uses
用具
特記事項
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インターネットの情報源
Estimates based on models
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.5020 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.02951 (0.01224 - 0.07115), b=2.91 (2.71 - 3.11), in cm total length, based on LWR estimates for this Genus-body shape (Ref.
93245).
栄養段階 (Ref.
69278): 3.1 ±0.4 se; based on size and trophs of closest relatives
回復力 (Ref.
120179): 高い, １５か月以下の倍増期間の最小個体群 (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref.
59153): Low vulnerability (10 of 100).
